Drafting-pen.



G. BENNETT.

DRAFTING PEN.

APPLICATION nun) MAR. 2a, 1913.

1,099,160, Patented June 9, 1914.

WITNESSES TINTTED STATES PATENT OFFICE.

GEORGE BENNETT, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR 0F ONE-HALF TOHERMAN W. SCHULZ, .OF PHILADELPHIA, PENNSYLVANIA.

DBAFTING-PEN.

Specification of Letters Patent.

rates-tea June a, 1914..

Application filed March 26, 1913. Serial No. 756,873.

To all whom it may concern:

Be it known that I, GEORGE BENNETT, a citizen of the United States,residing in the city of Philadelphia, county of Philadelphia, and Stateof Pennsylvania, have invented certain Improvements in Drafting-Pens, ofwhich the following is a specification.

My invention is designed to provide, particularly in a ruling pen,simple and eflicient means for opening or spreading the pen points andclosing them without disturbing the gage or distance apart at which theyhave been set.

In the accompanying drawings, Figurel is an elevation of a pen embodyingmy inven tion; Fig. 2 is a longitudinal sectional view of the same; Fig.3 is a view of the handle detached from the pen proper; Fig. 4: is aview of the pen proper detached from the handle; Fig. 5 is an elevationofa second form of the invention; Fig. 6 is a longitudinal sectionalview taken through the pen proper of Fig. 5; Fig. 7 is an elevation of athird form of the invention; Fig. 8 is a longitudinal sectional viewtaken through the pen proper of Fig. 7 and Fig. 9 is a sectional viewtaken on the line 9-9 of Fig. 7.

As illustrated in Figs. 1 to 4 inclusive, the pen comprises the hollowhandle 1 having the channeled shank 2 provided with the latch or movableside 3 pivoted on the screw 1, the axial passage 5 through the handlecommunicating with the longitudinal channel or socket 6, of squaredcross section, in the shank. The pen proper comprises the squared shank7 having the resilient legs or bifurcations 8 provided with the points9. In the assembled instrument, the shank 7 is disposedin the channel 6,with which it conforms; a rod 10, extending through the passage 5, isscrewed into the shank 7; the latch 3 closes the open side of thechannel 6, and a screw 11 passes through the hole 12 in the latch andthe slots 13 in the logs into the threaded hole 1 1 of the channeledshank. A cap 15, fixed to the top of the rod 10 and telescoped on thereduced tubular part 1' of the handle, affords convenient means formanually reciprocating the rod 10 and the pen proper fixed thereto.

In Fig. 1, the parts are in the position which they occupy in use, thecap 15 having been drawn back and, with it, the rod 10 and the shank 7together with the parts fixed thereto. In this position, the legs arepressed together by the engagement therewith of the walls of thechanneled shank 2, the part 3 thereof being provided with a cam 3 whichengages and frictionally clutches a cam S of the adjacent leg.

In Fig. 2, the parts are in the position which they occupy when thepoints are open or spread, as in cleaning. This relation of the partsresults from applying pressure upon the end of the cap 15, which iscommunicated through the rod 10 to the shank 7 so that these parts aremoved forward until the complementary earn 3' is cleared by the cam 8,when the points 9 are spread as a consequence of the resiliency of thelegs 8 now released from the lateral pressure which closes them, thefreedom of outward movement of the legs in this position, as well astheir resiliency, being facilitated by the reduction of the metal withthe production of the concavities 8". It will be understood that whenthe screw 11 has been adjusted to set the points 9 in the desiredrelation, the points can be opened for cleaning and closed for usewithout changing the position of the screw 11 or the relation of thepoints when closed, thus avoiding the usual necessity for niceadjustment, after opening the points, to maintain regularity in thewidth of lines.

In the form of the invention illustrated in Figs. 5 and 6, the handle 16has ashank 17 provided with the channel or socket 18 and with a latch ormovable side 19 hinged or pivoted onthe pintle 20. The pen propercomprises the shank 21 having connected therewith the legs 22 and 22 andthe points 23 and 23. The shank 21 is adapted to reciprocate in thesocket 18 in which it is held by the screw 24, which passes through thelatch 19 and the slots 25 of the legs into the threaded hole 26. Thelatch 19 is provided with a cam 27 which is adapted for engaging the camsurface 28 of the leg 22 to frictionally clutch and hold the pen properin its inner and operative position. WVhen it is desired to spread. thepoints 23 and 23, they are pulled outwardly, the cam 28 being disengagedfrom the cam 27 and the leg 22 permitted to spring outwardly, which isfacilitated by the concavity 22". WVhen the legs 22 and 22 are pushedinwardly, they are brought together by their engagement with the wall ofthe shank 17 in Figs. 7, 8 and 9', the handle 28 is pro-,

vided with a channeled or split shank 29 having the legs 29 and 29.proper is provided with the shank 30 having. thereon the legs 31 and 31provided with the points 32. A small T -bolt 33, having a head 33 whichengages arecess 33 in the part 29, passes through the slots 34 in thelegs 31 and 31, and has a nut 35 setin the desired position thereon forholding theparts 29 and 29, in the relation required for setting thepoints 82 when the shank 30 and the legs are in their inner position inthe shank 29. When the pen proper is drawn to its outer position withrelation to the shank 29, the points 32 are separated by the resiliencyof the part 31, and when the pen proper is thrust inwardly with respectto the'shank 29 the points are brought together at their operativerelation by the engagement of the parts 29 and 29" with the parts 31 and31, thepart 29 being provided with the cam surface 36 which coacts withthe complementary cam surface on the adjacent leg 31 to maintain thisrelation. Having described my invention, I claim:

1. .A drafting instrument comprising a handle provided with a socket, incombination with a furcated devicehaving a shank movable longitudinallyinsa-id socket and blades adjusted relatively to each other by thelongitudinal movement of said shank in said socket, and means engagingsaid handle for effecting the adjustment of said blades relatively toeach other in the normal writing position of said device in said socket.

2. A draftlng instrument comprlslng a handle provided with a shankcontaining a' socket, a slotted furcated device having a shank movablelongitudinally in and guided by'said socket, and means engaged by saidshank first named and disposed in the slot of said device for limitingthe longitudinal,

movement thereof.

3. A drafting instrument comprising a handle provided with a shankcontaining I a socket, a furcated device having a shank movable.longitudinally in said socket, and means comprising a cam by which -saidde vice and handle are fixed together and the legs of said furcateddevice are adjusted.

. 4. A drafting instrument comprising a handle having a shankcontaining'a socket,

The pen a device having a shank movable longitudinally in said socketand furcationsconnected with said shank, and a movable member engaged insaid first shank and engaging one of said furcations for adjusting itrelatively to the other of said furcations.

5. A drafting instrument comprisingv a handle providedwith a socket, adevice having a shank movable insaid socket and legs connected with saidshank, said device be- 6. A drafting instrument comprising a handleprovided with a socket and a movable bearing, a devicehavinga shankmov-' able in said socket and aslo-tted leg engaging said bearing, and,a membergconnected with said handle and passing through said slotted legwhereby said bearing is; adj usted and the movement of saidfir'st nameddevice is regulated. V n 7. A drafting instrument comprising a handlecontaining a longitudinal passage and provided with a shank containing achannel having an 'op'en side, saidi shank having a'movablememberadapted forlclos ing said; side, a device having pointed legs extendinginto said channel and having slots'in said legs, a device passingthrough said slots and connected "with said shank whereby said movablemember is held in the desired relation to one of said legs, and' a rodextendingthrough said passage and connectedjto'said first named devicewhereby said legs are reciprocated, said legs being adapted forseparating automatically and being pressed together by drawing them intosaid channel.

8. A" drafting instrument comprisinga handle having a shank with asocket therein, said shank being provide'd'with an adjustable cam, incombination'with a device'hav ing a shank movable in said socket andlegs on said 'lastnamed shank extending into said socket, one of saidlegs being'resilient and having a cam surface engaging said lcam,

and. means'for adjusting the position of sald cam andregulating itsbearlng ,withrelation to said cam surface. r a

i In testimony whereof I have hereunto set my namethis 25th day ofMarch, 1913, in

the presence of the subscribing witnesses.

. Y GEORGE BENNETT. Witnesses:

' Jos.-G. DENNY, J r.,'

Gno. A. CUNNEY.

cm" of this patent may be obtained torfive cents each, by addressing theCommissioner 01 l'atentl,

' Washington, D, 0.

